CVE catalog
CVE-2026-14586
In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, in DNS-over-QUIC environments, with high concurrency and under pressure, an assertion in libngtcp2 about monotonic timestamps could trigger and
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.37% · Oct 25, 2026
In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, in DNS-over-QUIC environments, with high concurrency and under pressure, an assertion in libngtcp2 about monotonic timestamps could trigger and result in server termination and thus denial of service. When interfacing with libngtcp2, for DNS-over-QUIC support in Unbound, it is expected to use monotonic time. Unbound was using realtime instead, and in DoQ environments with high concurrency and under pressure, an assert in libngtcp2 for the quic timestamp would trigger and terminate the server.This vulnerability needs Unbound to be compiled with DoQ support ('--with-libngtcp2') and the 'quic-port' to be configured for the listening interfaces.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | unbound | sid | 1.26.2-1 | fixed |
| Debian | unbound | forky | 1.26.2-1 | fixed |
| Debian | unbound | trixie | 1.22.0-2+deb13u3 | vulnerable |
| Debian | unbound | trixie-security | 1.26.2-0+deb13u1 | fixed |
| Debian | unbound | bookworm | 1.17.1-2+deb12u4 | vulnerable |
| Debian | unbound | bookworm-security | 1.17.1-2+deb12u3 | vulnerable |
| Suse | unbound | linux micro 6.0 | 1.25.2-1.1 | fixed |
| Suse | unbound | linux micro 6.1 | 1.25.2-slfo.1.1_1.1 | fixed |
| Suse | unbound | linux enterprise server 16.0 | 1.25.2-160000.1.1 | fixed |
| Suse | unbound | linux enterprise server for sap applications 16.0 | 1.25.2-160000.1.1 | fixed |
| Suse | unbound | linux enterprise server 16.0 | 1.25.2-160000.1.1 | fixed |
| Suse | unbound | linux enterprise server for sap applications 16.0 | 1.25.2-160000.1.1 | fixed |
| Opensuse | unbound | leap 16.0 | 1.25.2-160000.1.1 | fixed |
| Suse | unbound | linux micro 6.2 | 1.25.2-160000.1.1 | fixed |
| Opensuse | unbound | tumbleweed | 1.25.2-1.1 | fixed |
| Ubuntu | unbound | pro | 1.9.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | pro | 1.9.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.1 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.2 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.3 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.4 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.5 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.6 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.8 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.9 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.11 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.11+esm1 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.11+esm2 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.11+esm3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.1 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.2 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.4 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.5 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.7 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.8 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.10 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.11 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.12 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.13 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.14 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.15 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.16 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.17 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.17.1-2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.18.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.18.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.3 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.4 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.5 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.6 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.7 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.8 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.9 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.10 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.12 | vulnerable |
| Ubuntu | unbound | 26.10 | 1.24.2-1ubuntu2 | vulnerable |
| Ubuntu | unbound | 26.10 | 1.25.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 26.10 | 1.25.1-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.22.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.22.0-2ubuntu4 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu2 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu2.1 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu2.2 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu2.3 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu2.4 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | unbound | source | sid | 1.25.2-1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | forky | 1.25.2-1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | trixie | 1.26.1-0+deb13u1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Suse | unbound | rpm | linux micro 6.0 | 1.25.2-1.1 | Not reported | SUSE-SU-2026:23360-1 | Not reported |
| Suse | unbound | rpm | linux micro 6.1 | 1.25.2-slfo.1.1_1.1 | Not reported | SUSE-SU-2026:23349-1 | Not reported |
| Suse | unbound | rpm | linux enterprise server 16.0 | 1.25.2-160000.1.1 | Not reported | SUSE-SU-2026:23226-1 | Not reported |
| Suse | unbound | rpm | linux enterprise server for sap applications 16.0 | 1.25.2-160000.1.1 | Not reported | SUSE-SU-2026:23226-1 | Not reported |
| Suse | unbound | rpm | linux enterprise server 16.0 | 1.25.2-160000.1.1 | Not reported | SUSE-SU-2026:23215-1 | Not reported |
| Suse | unbound | rpm | linux enterprise server for sap applications 16.0 | 1.25.2-160000.1.1 | Not reported | SUSE-SU-2026:23215-1 | Not reported |
| Opensuse | unbound | rpm | leap 16.0 | 1.25.2-160000.1.1 | Not reported | OPENSUSE-SU-2026:21550-1 | Not reported |
| Suse | unbound | rpm | linux micro 6.2 | 1.25.2-160000.1.1 | Not reported | SUSE-SU-2026:23050-1 | Not reported |
| Opensuse | unbound | rpm | tumbleweed | 1.25.2-1.1 | Not reported | OPENSUSE-SU-2026:11380-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libunbound8]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [libunbound-dev]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [python3-unbound]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [unbound]Affected
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [unbound-anchor]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [unbound-host]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
[Debian 13 (Trixie)]
- [libunbound8]Affected
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
- [libunbound-dev]Affected
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
- [python3-unbound]Affected
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
- [unbound]Affected
Details (6)
1.22.0-2+deb13u3· amd64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
- [unbound-anchor]Affected
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
- [unbound-host]Affected
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityAffected · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.26.1-0+deb13u1nvd · unbound · debian · 13
[openSUSE Tumbleweed]
- [libunbound8]Unknown
Source package: [unbound]
Details (1)
1.26.0-2.1· x86_64 · tumbleweedUnknown · Fixed:
1.25.2-1.1Version impact unknown
nvd · unbound · opensuse · tumbleweed
- [python3-unbound]Unknown
Source package: [unbound]
Details (1)
1.26.0-2.1· x86_64 · tumbleweedUnknown · Fixed:
1.25.2-1.1Version impact unknown
nvd · unbound · opensuse · tumbleweed
- [unbound-anchor]Unknown
Source package: [unbound]
Details (1)
1.26.0-2.1· x86_64 · tumbleweedUnknown · Fixed:
1.25.2-1.1Version impact unknown
nvd · unbound · opensuse · tumbleweed
- [unbound-devel]Unknown
Source package: [unbound]
Details (1)
1.26.0-2.1· x86_64 · tumbleweedUnknown · Fixed:
1.25.2-1.1Version impact unknown
nvd · unbound · opensuse · tumbleweed
- [unbound-munin]Unknown
Source package: [unbound]
Details (1)
1.26.0-2.1· noarch · tumbleweedUnknown · Fixed:
1.25.2-1.1Version impact unknown
nvd · unbound · opensuse · tumbleweed
- [unbound]Fixed
Source package: [unbound]
Details (1)
1.26.0-2.1· x86_64 · tumbleweedFixed · Fixed:
1.25.2-1.1nvd · unbound · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11380-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-14586]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-14586]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23050-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23215-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23226-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23349-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23360-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-14586]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11380-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21550-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-14586]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-14586.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3038.json]
- [https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-14586.txt]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]